7
The number which best completes the sequence below is:1 1 3 2 4 6 5 25 ?
7
27
26
25
1 -1+2=1+4-2=3+5-6=2+7-5=4+9-7=6+11-... 50 is your best answer
1, 10, 2, 20, 3, 30, 4, 40, 5, 50, and so on.
26. ---- 24. ---- 27. ---- 25. ---- 28. ----
18 (3+1 4+2 6+3 9+4 13+5)
The sequence is not a finite one so it cannot be completed.
485
335